Which selection from the article helps the reader understand that a presidential candidate is supported by a political party?
(A) Most often the president comes from one of the two major political groups. They are the Democrats and the Republicans.
(B) A person must be at least 35 years old to run for president. They must have lived in the U.S. for at least 14 years.
(C) People called delegates go to the conventions. The delegates pass along the choices that the voters made in each state.
(D) Each state political group makes its own rules for getting on the ballot. As a result, voters in different states may have different choices.